Proserpinaca, Myriophyllum. 77 



lignosus, gracilis, minute canaliculatus et foliorum angulis decurrenübus lineatus, reptans 

 et adscendens vel suberectus, saepius simplex vel ramosus, partibus inferioribus sub- 

 mersis reptantibus radices multas longas ramosas proferens, ± 0,2 m altus, glaberrimus. 

 Folia 2 / 5 -divergentia alterna, omnia (emergentia subraersaque) pinnatifida, ± 4 6 mm 

 longa, lobis linearibus computatis ± 7 mm lata, parte media fere parallelinervia, lobis 

 et loborum axillis dentes minutos erectos portantibus. Flores hermaphroditi, in foliorum 

 axillis sessiles, solitarii vel raro dichasium triflorum constituentes, bracteolis binis minutis 

 lanceolatis serratis praediti; receptaculum 3-alatum, alis ovario ± 0,5 mm diam. 

 metiente minoribus crasse rotundatis; sepala 3, ex ovato acuminata, tunc rotundata, 

 fere triangularia, suberecta, ±: 0,8 mm longa et ± 0,6 mm lata, paullo concava 

 glaberrima; petala 3, rudimentaria subglobosa et acutiuscula fere abortiva; stamina 6, 

 tria episepalea normalia sepala superantia, fllamentis basi dilatatis filiformibus ovario 

 innatis sepalis aequilongis, antheris ellipticis basifixis lateraliter dehiscentibus ± 0,4 mm 

 longis et latis; stamina 3 epipetalea rudimentaria fere abortiva, corporum subglobo- 

 sorum minutissimorum (non nisi microscopice inspiciendo) adspectum praebentia; styli 3, 

 sepala paullo superantes, basi globose incrassati, ad partem superiorem 3-plo longiorem 

 cylindricam papillosi ; ovarium 3-loculare, ovulis in loculis solitariis, loculis bene discretis 

 septis persistentibus. Fructus e triquetro urceolatus 3-gonus rugosus, angulis rotundatis, 

 3-locularis, 3-spermus. — Fig. 22. 



In Sümpfen in den Vereinigten Staaten von Nordamerika: Plymout, Massa- 

 chusetts (Distrib. H. van Heurck n. 154, Oakes, Tuckerman), New Bedford (Greene), 

 N. Jersey (Knieskern, Herb. A. Gray, Peters, Cabanis, Clute, Tweedy, 

 Knight, Macnab), Delaware (Canby), Carolina (Elliott, Delile, Schweinitz), 

 Nova Caesarea (Curtis, Eaton, Bischoff), Alabama (Torrey, Mohr), Phila- 

 delphia (Friedley), Forida (Herb. A. Gray, Curtis n. 890, 4705, Nash n. 1089, 

 Herb. Chapman), Georgia (A. Gray, Harper n. 844, Beyrich), Nova Anglia (Tucker- 

 man), New Orleans (Drummond n. 112). — Blüht in den nördlichen Staaten Mai — 

 September, in den südlichen Staaten April — Juli. 



Einheimischer Name: Cut-leaved Mermaid-weed. 



Tribus 2. Myriophylleae Schindler nov. trib. 



Carpella testa sclerenchymatica communi carentia; fructus maturus in merocarpia 

 divisus. 



6. Myriophyllum L.*) 



Myriophyllum L. Spec. pl. ed. 1. (1753) 992 et Syst. ed. 10. (1759) 1270 et 

 Spec. pl. ed. 2. (1763) 1409; Juss. Gen. (1789) 18 et Ann. Mus. Paris III. (1804) 321; 

 Michx. Fl. bor. amer. II. (1803) 190; P. DC. Fl. franc. IV. (1805) 416 et V. (1815) 

 529 et in DC. Prodr. Hl/ (1828) 68; Koch, Synops. (1836) 244; Torr, et Gray, Fl. 

 North-Am. I. (1840) 528; Endl. Gen. (1840) 1196 et 4 427; Benth. Fl. austral. II. 

 (1864) 486; Benth. et Hook. f. Gen. I. (1865) 676; Clarke in Hook. f. Fl. Brit. Ind. 

 II. (1878) 432; Petersen in Engl, et Prantl, Pflzfam. III. 7. (1898) 234. — Myrio- 

 phyllum Ponted. ex L. Syst. ed. 1. (1735) et Hort. Cliffort. (1737) 446, Gen. ed. 1. 

 (1737) 290. — Myriophyllon Vaill. in Act. Acad. Paris (1719) 23; Adans. Farn. II. 

 (1763) 471; Baill. Hist. pl. VI. (1877) 477. — Myriophillum Gmel. Sibir. III. (1786) 35. 



Flores hermaphroditi vel monoici rarissime dioici, 4-meri. Calycis tubus 4-sul- 

 catus, brevissimus, lobis 4 deciduis, vel raro 0. Petala 4, cucullata, glaberrima. 

 Stamina 8 vel 4, fllamentis longis, antheris late linearibus. Styli 4, breves, erecti, 

 capitato-stigmatosi. Ovarium 4-loculare, 4-ovulatum, loculo unoquoque pulamine circum- 

 dato. Fructus 4-coccus. Semina pendula oblongo-cylindracea, testa membranacea, 

 embryone in axi albuminis copiosi cylindraceo. Flores q 1 calycis tubo reducto, stylis 



*) fivQioi = innummera; cpvkXä = folia. 



